Shell Programming and Scripting

Originally Posted by sudo

Basically, these servers are both running this program. The folders that are being synced are AFP share points that are used by people to upload files over a network. The idea is each country has a local repository of data, for performance measures.

The program reaches out to the far server and grabs the status, and uses that for rsync authentication. This is just to prevent synonymous syncing, which is problematic when large files upload to afp. The server will start the rsync before the file is finished uploading to the AFP share point, causing this chain reaction of syncing partly uploaded files between both servers.

i REALLY wanted to simply have the rsync wait until any AFP upload is done, but fswatch triggers the rsync when a change is made to the folder, including the start of the upload. I didn't see a way to have the script identify if a file was still uploading (there is nothing unique about a file upload-in-progress to use as a conditional for the script?)

Code:

n=0
until
    ssh user@servaddress 'cat /Users/admin/localserv/localserverstatus' 1> $REMOTESTAT && grep -q Closed "$REMOTESTAT"; do
        n=$((n + 1))
        if [ $n -ge 1000 ]
        then    echo 'server unavailable'
        exit 1
        fi
    echo 'waiting for sever to finish'
done
echo 'Open' 1> $LOCALSTAT
rsync -rvza --delete-after --progress $LOCALFOLDER $REMOTEFOLDER
echo 'Closed' 1> $LOCALSTAT

Originally Posted by Don Cragun

You don't need a local copy of the remote's localserverstatus file for this. Change:

Code:

    ssh user@servaddress 'cat /Users/admin/localserv/localserverstatus' 1> $REMOTESTAT && grep -q Closed "$REMOTESTAT"; do

to:

Code:

    ssh user@servaddress 'cat /Users/admin/localserv/localserverstatus' | grep -q Closed; do

Are you sure you don't want a short sleep in that loop?